Revenue

Remaining Performance Obligations

The Company had $823.3 million of remaining performance obligations yet to be satisfied as of June 30, 2019. The Company expects to recognize approximately $656.4 million of its remaining performance obligations as revenue within the next twelve months.

Contract Balances

Contract terms with customers include the timing of billing and payment, which usually differs from the timing of revenue recognition. As a result, we carry contract assets and liabilities in our balance sheet. These contract assets and liabilities are calculated on a contract-by-contract basis and reported on a net basis at the end of each period and are classified as current. We present our contract assets in the balance sheet as Costs and Estimated Earnings in Excess of Billings on Uncompleted Contracts ("CIE"). CIE consists of revenue recognized in excess of billings. We present our contract liabilities in the balance sheet as Billings on Uncompleted Contracts in Excess of Costs and Estimated Earnings ("BIE"). BIE consists of advance payments and billings in excess of revenue recognized. The following table provides information about CIE and BIE:



	June 30, 2019			June 30, 2018			Change
	(In thousands)
Costs and estimated earnings in excess of billings on uncompleted contracts	$	96,083		$	76,632		$	19,451
Billings on uncompleted contracts in excess of costs and estimated earnings	(105,626		)	(120,740		)	15,114
Net contract liabilities	$	(9,543	)	$	(44,108	)	$	34,565

The difference between the beginning and ending balances of the Company's CIE and BIE primarily results from the timing of revenue recognized relative to its billings. The amount of revenue recognized during the twelve months ended June 30, 2019 that was included in the prior period BIE balance was $120.7 million. This revenue consists primarily of work performed during the period on contracts with customers that had advance billings.

Gross amounts of contact assets and liabilities on uncompleted contracts are as follows:



	June 30, 2019			June 30, 2018
	(In thousands)
Costs incurred and estimated earnings on uncompleted contracts	$	1,942,903		$	2,081,799
Billings on uncompleted contracts	1,952,446			2,125,907
Net contract liabilities	$	(9,543	)	$	(44,108	)

Progress billings in accounts receivable at June 30, 2019 and June 30, 2018 included retentions to be collected within one year of $21.9 million and $25.9 million, respectively. Contract retentions collectible beyond one year are included in other assets in the Consolidated Balance Sheet and totaled $17.7 million as of June 30, 2019 and $2.6 million as of June 30, 2018.

Disaggregated Revenue

The following table presents revenue disaggregated by the geographic area where the work was performed:



	Twelve months ended
	June 30, 2019		June 30, 2018		June 30, 2017
	(In thousands)
United States	$	1,367,844	$	981,292	$	961,049
Canada	41,410		104,208		228,625
Other international	7,426		6,053		7,835
Total	$	1,416,680	$	1,091,553	$	1,197,509